First, when it is a simple tube, it is like the heart of most fishes.

首先，当它只是一根管子的时候，它像大部分鱼的心脏。

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Here are the world's most dangerous fishes.

这是世界上最危险的鱼类。

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A New Guinea has some of the most beautiful freshwater fishes found anywhere, including gobies, gudgeons and rainbow fish.

新几内亚拥有一些最漂亮的淡水鱼，而且这些鱼随处可见。包括暇虎鱼，白杨鱼以及彩虹鱼。

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